Synthesis p. 795 - 800 (1995)
Update date:2022-08-02
Topics:
Merz
Schropp
Dotterl
A five-step general synthesis of 3,4-dialkoxypyrroles 7c-f is described starting with the condensation of dimethyl N-benzyliminodiacetate (1 b) and diethyl oxalate to give dimethyl 1-benzyl-3,4-dihydroxypyrrole-2,5-dicarboxylate (2b), which is bis-O-alkylated to the corresponding 3,4-diethers 3c-g. Pyrrole N-benzyl cleavage followed by ester hydrolysis and decarboxylation leads to 7c-f in 10-50% overall yield. Pyrroles 7c-f react with formaldehyde or benzaldehydes to give meso-H- (8a-d) or meso-tetraaryloctaalkoxyporphyrins 9a-g in moderate yields.
View MoreCangzhou Senary Chemical Science-tech Co., Ltd
Contact:+86-317-3563899, 3563699
Address:168 Jinde Road, Cangzhou, Hebei, China
Shenzhen Tianyuan Pharmaceutical Technology Co., Ltd
website:http://www.tianpharm.com
Contact:86-755-23284190
Address:B302,2 unit, Jin Lian Building, No. 134 Qianjin 2 Road, Taoyuan village, Xixiang Street, Baoan,Shenzhen,China
Jinzhou Jiutai Pharmaceutical Co.,Ltd
Contact:+86-0416-5179890
Address:No.41, Taianli, Taihe District, Jinzhou, Liaoning
Tianjin Jiuri New Materials Co., Ltd.
Contact:+86-22-58889220
Address:C-5/6, Vison Hill, No.1 Gonghua Road, Huayuan Hi-tech Park, Tianjin, China.
Naturalin Bio-Resource Co., Ltd
website:http://www.naturalin.com
Contact:+86-0731-84430651
Address:B1-402, Lu-Valley Enterprise Square.No.27 Wenxuan Road. Lu-Valley Hi-Tech District.
Doi:10.3762/bjoc.16.65
(2020)Doi:10.1007/s10593-009-0355-y
(2009)Doi:10.1021/ja01068a026
(1964)Doi:10.1021/ja01187a010
(1948)Doi:10.1021/ol062589y
(2006)Doi:10.1016/S0040-4020(01)99320-2
(1984)